Fix test broken by D73809989 (pytorch#153413)

Summary: I forgot to remove this unused field in D73809989.

Test Plan: `buck test 'fbcode//mode/opt' fbcode//caffe2/test:fbonly -- --exact 'caffe2/test:fbonly - test_compilation_metrics_logger_in_sync (caffe2.test.fb.test_fb.TestFBOnly)'`

Pull Request resolved: pytorch#153413
Approved by: https://github.com/c00w

Author: masnesral

test/dynamo/test_utils.py

@@ -310,7 +310,6 @@ def test_dynamo_timed(self, mock_time, mock_time_ns):
  'compliant_custom_ops': set(),
  'config_inline_inbuilt_nn_modules': False,
  'config_suppress_errors': False,
- 'cuda_synchronize_time_us': None,
  'cuda_version': None,
  'cudagraph_skip_reason': None,
  'distributed_ephemeral_timeout_us': None,
@@ -402,7 +401,6 @@ def test_dynamo_timed(self, mock_time, mock_time_ns):
  'compliant_custom_ops': None,
  'config_inline_inbuilt_nn_modules': None,
  'config_suppress_errors': None,
- 'cuda_synchronize_time_us': None,
  'cuda_version': None,
  'cudagraph_skip_reason': None,
  'distributed_ephemeral_timeout_us': None,

torch/_dynamo/utils.py

@@ -1245,7 +1245,6 @@ class CompilationMetrics:
     runtime_cudagraphify_time_us: Optional[int] = None
     runtime_triton_autotune_time_us: Optional[int] = None
     dynamo_compile_time_before_restart_us: Optional[int] = None
-    cuda_synchronize_time_us: Optional[int] = None  # TODO: instrument
     distributed_ephemeral_timeout_us: Optional[int] = None
     structured_logging_overhead_us: Optional[int] = None
     remote_fx_graph_cache_get_time_us: Optional[int] = None